What Is Toby's Last Name on This Is Us?

This Is Us: Does Toby Even Have a Last Name?

We've learned quite a bit about Toby (Chris Sullivan) during the past two seasons of This Is Us — he was previously married; he's a fan of big romantic gestures for his fiancée Kate; and he really loves dogs and old TV shows. But there's one thing about Toby that we never really hear about on the series — his last name.